Method of attaching sealing or labeling strips or the like to boxes, cases, and wrappings made of metal-foil-covered paper, cardboard, and the like



Oct. 20, 1931. RADO METHOD OF ATTACHING SEALING OR LABELING STRIPS ORTHE LIKE TO BOXES, CASES, AND WRAPPINGS MADE OF METAL FOIL COVEREDPAPER, CARDBOARD, AND mm LIKE Filed Sept. 1'7, 1928 L ,0 0/? Fade In reI'd/ lftta/l! 5)! Patented Oct. 20, 1931 UNITED, STATES PAT ENT oFF cI:

LEOPOLD orminnm-nnmirsnn, GERMANY METHOD OF'ATTACHIN G SEALING OR.LABELJ ING STRIPS OR THE LIKE TQ BOXES, CASES,

AND WRAPPINGS OF METAL-FOIL-COVEBED PAPER, CARDBOARD, A'NDHTEE LIKEApplication filedv September 17, 1928, Serial No.

It is well known that a variety of articles are manufactured to-day ofpaper, cardboard and the like covered with metal foil. Boxes, cases andthe like of all kinds are made by pressing, drawing and similarlyworking such material. Difficulties have, however, been experienced inthe sealing or labeling of these bodies covered with metal-foil,inasmuch as the metal layers do not take the adhesive material well.Thus, for example, in the sealing of capped boxes, which are mademechanically by stamping and pressing, the lower and upper parts must beoverlaid with a sealing strip. If the attempt is made to apply thisstrip by an adhesive straight on to the metal foil, it is found that itis impossible to do this reliably by means of adhesives, because thestrip after a given time, when the adhesive has dried, gradually becomesloose. This difficulty is the principal reason why the manufacture ofboxes, containers and the like of paper, cardboard and the like coveredwith metal foil, is made extremely difficult. I

It has been found that the disadvantages referred toare entirelyobviated if those portions of the metal foil where a strip or the likeis to be attached by an adhesive are cut away before such foil isapplied to the box or the like or if the already applied metal foil ismechanically removed at least in part by means of brushes or millingdevices from those portions of the surface where the strip or the likeis to be attached by an adhesive or if the metal foil is cut throu honeor more times by means of suitable evices so that thin grooves areformed by the cut and ensure a fast adherence of the applied strip. Itis only in this way that it is made possible to attach sealing orlabelling strips and the like to the boxes and the like by means of theordinary adhesives used.

In orderto distinctly illustrate my invention I have constructed Figures1, 2, 3 and 4 showing that the process can be carried. through in avariety of ways correspondingly applied. 8

These figures are perspective views and a cross section of boxesof cardboard covered with metalfoils to which sealing and label- 306,615, andin Germany S mara-1927.

points 2 where the completed box is to have a strip 3 I or the likeadhesively secured thereto.

Fig. 2 shows a box of card boardor other;

material which is already covered entirely with metal foil 1. The parts2 where a strip or the like is to be secured adhesively to the boxare'treated with rotating steel, brushes, milling devices and the likeand in this mannor the metal foil is in part or wholly removed.

Fig. 3 shows that the-parts in question of the metal foil 1 may also beout through one or more times by means of suitable devices. Fig; 4 is across section along the line a=-b of ig. 3 and illustrates that the thingrooves good adherence of the strips 3 which are fastened in the groovesby means of an adhesive.

By applying the new method in the man-' ner above set out there isensured-in an extremely simple manner a reliable and permanentconnection, by means of the ordinary known adhesives, and the strips orthe like which are to be attached adhere to the pierced or otherwisetreated parts very strongly. In the case of finished boxes :or the like,the mechanical treatment is preferor milling tool mounted in a suitablemounting, in the opposite direction to the travel of the body coveredwith the foil. The brush or milling device may of course also beintroduced into the series of operations employed in the manufacture ofthe boxes.

The new process is particularly suitable for the, manufacture of foldingboxes, car-= tons, bags, and pressed and drawn packings.

What I claim is: 1. The method of attaching labels to metalfoil coveredfibrous material which comprises mechanically removing a portion of themetal foil corresponding. in area to the 2 formed by the out aresuficient to ensure ably carried out by rotating a suitable brush areaof the label, andattaching a label to the exposed fibrous materialsurface by means of an adhesive.

2. The method of attaching labels to metal foil covered fibrous materialwhich comprises cutting out a portion of the metal foil cor- Yresponding in area to the area of the label and attachin a label to theexposed fibrous material sur ace by means oi an adhesive.

3. The method of attaching labels to metal foil covered fibrous materialwhich comprises removing a portion ot the metal foil by abrasion andattaching a label to the exposed fibrous material surface by means of anadhesive. t

4. The method of attaching labels to metal foil covered fibrous materialwhich comprises cutting narrow strips of foil from the main portionthereof and attaching a label by means of an adhesive to the saidfibrous material in such a manner that it covers the said strips.

5. A new article of manufacture comprising a metal foil covered fibrousmaterial from which a portion thereof has been removed and a labelattached to the fibrous material at the portion from. which the metalfoil has been removed,

In testimony whereof I have signed my name to this specification.

LEOPGLD RADU.

